Hi @lapomegranate, I don't think there is a standard notion of what a recruitment event should be. For instance, this school invited me to their recruitment event weekend without any interviews, and all my interviews were conducted over the course of a single day. However, for another school, I got invited to the recruitment event after I had been admitted. I think the timeline is crucial for understanding what would be expected. If you've been admitted, then the recruitment event will be to persuade you to join them; however, if it is pre-admittance, then both you and faculty are trying to assess if you can work together, so this might be like a second round of interviews with additional events such as (virtual) campus tours, chats with grad students etc. That said, compared to your previous official interview, there will be a little more onus on the faculty to convince you that their department will be good for you since you're a serious contender for admission.
This is good news, congrats and good luck!